Cheng-Feng Li

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In this paper, we present a software defined radio (SDR) implementation for generating the downlink (DL) signal according to the LTE R13 narrowband internet-of-things (NB-IoT) spec. Given the NB-IoT DL parameters, all its six baseband physical (PHY) signals/channels are firstly generated in software. Then we turn the USRP SDR platform into a vector signal(More)
The problem of traffic redundancy in the cooperative and consistent behavior of swarm robots system is studied in this paper. Based on the existing flocking model and distributed controller with local interaction, the optimum communication frequency of swarm system is obtained by using particle swarm optimization. To further reduce the traffic among(More)
To measure and verify various LTE UE and eNodeB chips and modules, the LTE vector signal analyzer (VSA) is often needed to measure the physical layer for both the FDD and TDD modes. Without using those costly off-the-shelf VSAs, this paper presents a software-defined radio (SDR) approach to develop cross-platform LTE VSA. The VSA SDR platform is clearly(More)
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